In 5w-30: 5w-30 fully synthetic from any of Shell, Total, Kixx, Caltex / Havoline, or even PSO.
In 10w-30: Caltex / Havoline only! 
Prefer to change oil from engine oil change booths at reputed fuel stations, and from 208L drum dispensers. It costs super cheap.
Change oil + oil filter after every 5,000 Kms / 06 months, whichever comes 1st. If oil level drops in-between, simply top it up.
Ensure that engine oil, and oil filter, both are 100% authentic.
I hope, all above helps and guides. Thank you.